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Table 3 Number of pigs (%) with detectable antibodies at weaning and description of other categorical variables

From: Longitudinal study of influenza A virus circulation in a nursery swine barn

Variable

Study 1a

Study 2b

N (%)

N (%)

H3N2_A + vec

15 (18.5)

66 (88.0)

H3N2_B +vec

49 (60.5)

72 (96.0)

H3N2_C +vec

39 (48.1)

61 (81.3)

H3N2_home +ved

60 (74.1)

67 (89.3)

H1N2 +vee

43 (53.1)

62 (82.8)

H1N1_C +vef

7 (8.6)

14 (18.7)

H1N1_P +veg

15 (18.5)

24 (32.0)

H1N1_home +ved

42 (51.8)

22 (29.3)

Cluster_H3N2_Heterologoush

 Cluster 1 (low heterologous)

65 (80.2)

45 (60.0)

 Cluster 2 (high heterologous)

16 (19.7)

24 (32.0)

 Cluster 3 (high heterologous)

–

6 (8.0)

 PRRSV +vei

25 (30.9)

14 (18.7)

 Mhyo +vej

67 (82.7)

64 (85.3)

 Female

52 (65.8)

37 (49.4)

 Male

27 (34.2)

38 (50.7)

 Room5

45 (55.6)

30 (40.0)

 Room6

9 (11.1)

30 (40.0)

 Room7

27 (33.3)

15 (20.0)

  1. a,bTwo distinct longitudinal studies were performed in nursery pigs.
  2. cDifferent H3N2 variants broadly classified into cluster 4 of H3N2 swine influenza A virus and isolated in Ontario in 2012 and used in the hemagglutination inhibition assay.
  3. dH3N2 and H1N1 viruses detected in the study and used as antigens in the hemagglutination inhibition assay.
  4. eH1N2 with hemagglutinin of the 2009 pandemic lineage and neuraminidase of the Cluster 4 H3N2 IAV-S.
  5. fH1N1 influenza A virus (IAV-S) broadly classified as the classical swine H1N1 virus used in hemagglutination inhibition assay.
  6. gH1N1 influenza A virus (IAV-S) of the 2009 H1N1 pandemic lineage used in hemagglutination inhibition assay.
  7. hGroupings based on cluster analysis of maternally derived antibodies for heterologous strains of H3N2 viruses (labeled here withc).
  8. iPositive for maternally derived antibodies for PRRSV.
  9. jPositive for maternally derived antibodies for Mycoplasma hyopneumoniae.
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Veterinary Research

ISSN: 1297-9716